taguchi v0.2.0

[0.2.0] - 2025-01-17

Added

DOE Analysis Module (doe feature)

Complete Taguchi DOE analysis functionality for experimental data:

• Main Effects Analysis: Calculate level means, effects, ranges, and factor rankings
• Signal-to-Noise Ratios: Support for all three optimization types:
  • Larger-is-better: S/N = -10 * log10(mean(1/y^2))
  • Smaller-is-better: S/N = -10 * log10(mean(y^2))
  • Nominal-is-best: S/N = 10 * log10(mean^2/variance)
• ANOVA with Factor Pooling:
  • Sum of squares, degrees of freedom, mean squares
  • F-ratios and p-values using regularized incomplete beta function
  • Configurable pooling threshold with minimum unpooled factors constraint
  • Contribution percentages
• Optimal Settings Prediction:
  • Uses correct additive model for predictions
  • Confidence intervals with proper effective sample size calculation
  • Support for 90%, 95%, and 99% confidence levels
• Statistical Utilities:
  • ln_gamma() - Lanczos approximation
  • regularized_incomplete_beta() - Continued fraction expansion
  • f_distribution_p_value() - F-distribution CDF
  • t_value() - Complete lookup tables for common confidence levels

Parallel Construction (parallel feature)

High-performance parallel row generation using rayon:

• ParBose - Parallel Bose construction
• ParBush - Parallel Bush construction
• ParAddelmanKempthorne - Parallel Addelman-Kempthorne construction
• ParHadamardSylvester - Parallel Hadamard-Sylvester construction
• par_build_oa() - Convenience function with automatic algorithm selection

Addelman-Kempthorne Construction

New construction algorithm for odd prime power levels:

• Produces OA(2q^2, 2q+1, q, 2) for odd prime power q
• Complements Bose-Bush (which handles powers of 2)
• Uses quadratic non-residues for transformation constants
• Integrated into builder auto-selection

Changed

• Rust edition 2024: Updated to latest Rust edition (requires Rust 1.85+)
• Updated full feature to include doe
• Improved builder auto-selection to consider Addelman-Kempthorne for odd prime powers
• Enhanced prelude exports with parallel and DOE types

Fixed

• N/A (first feature release)

Documentation

• Added comprehensive module documentation for all new features
• Updated roadmap with completed milestones
• Added DOE migration documentation

Full Changelog: https://github.com/Epistates/taguchi/commits/v0.2.0